150results about How to "Improve thermal deformation" patented technology

A liquid radiation-curable composition that comprises

• • (A) at least one polymerizing organic substance comprising a mixture of
    • (1) at least one alicyclic epoxide having at least two epoxy groups; and
    • (2) at least one difunctional or higher functional glycidylether of a polyhydric compound;
  • (B) at least one free-radical polymerizing organic substance comprising a mixture of
    • (1) optionally, at least one trifunctional or higher functional (meth)acrylate compound; and
    • (2) at least one aromatic di(meth)acrylate compound;
  • (C) at least one cationic polymerization initiator;
  • (D) at least one free-radical polymerization initiator;
  • (E) optionally, at least one hydroxyl-functional aliphatic compound; and
  • (F) at least one hydroxyl-functional aromatic compound;

wherein the concentration of hydroxyl groups in the radiation-curable composition is at least about 1.1 equivalent OH groups per kilogram;

wherein the concentration of epoxy groups in the radiation-curable composition is at least about 5.5 equivalent epoxy groups per kilogram; and

wherein the amount of trifunctional or higher functional (meth)acrylate compound (B)(1) is from 0% to about 3% of the composition and the amount of aromatic di(meth)acrylate compound (B)(2) is at least 10% of the composition.

Compositions made from a polyarylate or polyester carbonate containing greater than about 50 mole % resorcinol based ester linkages give miscible blends with polyimide resins, addition of alkyl amide compounds improves mold release and melt flow while maintaining transparency. The blends also have high refractive index and low haze.

The invention relates to a formula design for a thermoplastic halogen-free low-smoke flame-retardant cable insulating material and the manufacturing process thereof, concretely, using polyethene copolymer and/or modified ethylene-propylene rubber as a substrate, adding in halogen-free and nontoxic flame-retardant agent (nano magnesium hydroxide or aluminum hydroxide) and inorganic crystal whisker strengthening material as primary components, and adding in proper assistant, proportioning, mixing, plasticizing and making grains to make the insulating material. Its technical characters: not containing halogen, P, Al and other heavy metals; having god mechanical property, machining property and superior flame retardancy and having excellent thermal deforming, thermal ageing and thermal shock properties. The made cables have high safety and reliability. It is applied to the cables operating at 70 deg.C-105 deg.C long time, such as ship cables, cables for nuclear power plants, power and control cables for high-rise buildings, etc.

A modified low density polyethylene material used for 3D printing comprises, by weight, 80-95 parts of low density polyethylene, 1-10 parts of an inorganic nanoparticle filler, 1-5 parts of a coupling agent, 5-10 parts of a flexibilizer, and 1-5 parts of an antioxidant. The modified low density polyethylene material has the advantages of very good fusion viscosity, very good fluidity, very good heat resistance and very good wear resistance, accords with the characteristics a 3D printing material, and has a wide application prospect in the 3D printing technology.

In a semiconductor device in which a plurality of wiring substrates each mounting an electronic component are stacked and sealed by a resin, the semiconductor device can be downsized, thinned, and highly reliable, and its manufacturing cost can be reduced. By using a metal paste for electrical connection between the stacked lower-layer side wiring substrate and upper-layer side wiring substrate, a connecting pitch can be smaller than that in a connecting method of using a solder ball including Cu core, and the connection at low temperature can be achieved. Also, by coating a metal paste by a print-coating method or a dispense-coating method, manufacturing steps are simplified, so that the manufacturing cost is reduced.

The invention provides a honing strip and a manufacturing method thereof. The method comprises the following steps of: mixing first metal powder prepared from components in a predetermined proportion and nonmetal powder such as graphite, Fe3O4 or MoS2 to form a bonding agent, adding a predetermined amount of abrasive such as diamond or cubic boron nitride (CBN for short) into the bonding agent, and performing granulation to obtain working layer granules; performing granulation on second metal powder to obtain transition layer granules; arranging the working layer granules in a first die to form a working layer of the honing strip, arranging the transition layer granules in the first die and on the working layer to form a transition layer, and pressing the first die to form a preformed honing strip; and charging the preformed honing strip into a second die, and performing hot pressing forming to obtain the honing strip. The honing strip has the characteristics of good exposure effect, low grinding resistance, low heating deformation of a honing head, long durability, high precision of machined workpieces, good finishment and the like.

There is provided a brake disc in a disc brake for a vehicle, which can be manufactured lightweight, suppress the thermal deformation and is effective to prevent the brake noises. This brake disc (2) is supported by a wheel 4 through a plurality of support members (10) and is operable to exert a braking force when sandwiched by frictional pads (8, 8). The brake disc (2) has an outer peripheral face (2b) formed with a plurality of outer recesses (11) deploying in a circumferential direction. Accordingly, the radial width (f) of the braking surfaces (9), with which the frictional pads (8) is engageable, varies in a direction circumferentially thereof.

The glass substrate optical reading infrared sensor features in the light through but infrared blocked glass substrate, side support flat beam unit with two sets of thermal deformation mechanism at both sides of the infrared absorbing plate, baffling distributed through the heat insulation beam and thermal deformation beam. The thermal deformation mechanism connected to both sides of the infrared absorbing plate with its inner side, with the outside end beam fixed on the glass substrate through the anchor erect. The heat insulation beam is nonmetallic film, the heat deformation beam is dual material beam formed on the nonmetallic film coated on the metal film, infrared absorbing plate having its reflective surface facing the glass substrate, visible light passing through the glass substrate projected on the reflective surface, with the infrared light directly projecting on the other side. It eliminates the frame structure, alleviates the dimensional conflict on the same flat layer due to the heat deformation mechanism and the infrared absorbing plate, effectively improving the super infrared detection sensitivity.

The invention discloses an aluminum alloy section for an automobile bumper. The aluminum alloy section comprises the following elements in percentage by mass: 6.0-6.5% of Zn, 0.8-1.0% of Mg, 0.2-0.3% of Mn, 0.1-0.2% of Cu, 0.2-0.3% of Ti and the balance of Al and inevitable impure elements; a preparation method of the aluminum alloy section comprises the following steps: (1) smelting, (2) refining, (3) casting, (4) homogenizing and extruding, and (5) quenching and aging, so as to obtain an aluminum alloy section finished product. The aluminum alloy section prepared by the invention is good in thermal deformation and machinability and excellent in corrosion resistance and welding property, and the produced automobile bumper is light in weight and can better absorb collision impact energy; the aluminum alloy section achieves various technical indexes of the automobile bumper speculated by the nation in performance, and further meets the development tendency of light weight of modern automobiles.

The present invention provides a multilayered plastic substrate that simultaneously satisfies improvement in high temperature thermal deformation according to low linear expansion coefficient and excellent dimensional stability and excellent gas barrier property, and is capable of being used instead of a glass substrate that has brittleness and heavy disadvantages without a problem caused by a difference in linear expansion coefficient between layers, and a method for manufacturing the same.

The invention belongs to the field of a composite high-molecular material and relates to an alkali-free short glass fiber reinforced nylon material and its preparation method. The alkali-free short glass fiber reinforced nylon material is prepared from the following components, by weight, 40-70 parts of nylon, 20-50 parts of alkali-free short glass fiber, 3-8 parts of a lubricant and 2-7 parts of an antioxidant. In comparison with the prior art, the preparation technology is simple; the material has advantages of low water absorption, superior stability and high thermal deformation temperature; the added alkali-free short glass fiber undergoes silane coupling agent surface treatment and has good caking property with a resin matrix; the length of the added glass fiber is short such that the glass fiber is uniformly dispersed in the resin matrix; and after injection moulding, the material is surface-brightening and there is no glass fiber flow liner or exposure.

The invention discloses a wood plastic composite section bar and a production technology thereof. The wood plastic composite section bar comprises the following raw materials in parts by weight: 40-60 parts of PVC, 10-15 parts of wood powder, 20-30 parts of CACO3, 1-3 parts of a stabilizer, 1-2 parts of a foaming agent, 1-2 parts of a lubricating agent and 4-6 parts of processing additives. The wood plastic composite section bar is reasonable in formula design, has a coupling toughening function, is capable of promoting the mechanical properties of material, is beneficial to the promotion of rigidity and thermal deformation of products and is available for indoor and outdoor wood plastic products and products with higher requirement on thermal deformation; a toughening agent CPE is added, so that the toughness of the product is higher; the wood plastic composite section bar has high heat stability, weather fastness and anti-ultraviolet function; the section bar is high in compatibility with resin, high in dispersibility, and capable of increasing production rate and promoting the surface glossiness of products; the wood plastic composite section bar has anti-fogging and antistatic functions; the wood plastic composite section bar is suitable for production wood plastic skirting lines, door pocket lines, sill lines, ecological wood, hollow panels, floor boards, stair railings, ventilated windows, micro-foamed cabinet panels, wave panels, and other products.

There is provided a brake disc in a disc brake for a vehicle, which can be manufactured lightweight, suppress the thermal deformation and is effective to prevent the brake noises. This brake disc (2) is supported by a wheel 4 through a plurality of support members (10) and is operable to exert a braking force when sandwiched by frictional pads (8, 8). The brake disc (2) has an outer peripheral face (2b) formed with a plurality of outer recesses (11) deploying in a circumferential direction. Accordingly, the radial width (f) of the braking surfaces (9), with which the frictional pads (8) is engageable, varies in a direction circumferentially thereof.

The invention discloses a method for manufacturing a CNT (carbon nanotube) composite transmission conductor, which comprises the following steps: filling MCNT (multiwalled carbon nanotube) powder accounting for 1 to 7 percent of the total mass into small holes uniformly drilled on electrotechnical aluminium blocks; stacking two aluminium blocks in which the MCNT powder has been filled inversely by using a blind-hole method; after the two aluminium blocks are prepared into composite materials through a friction extrusion process, carrying out tandem rolling and drawing on the composite materials so as to prepare the composite materials into required CNT/aluminum based composite material round wires; and finally, stranding the round wires by a wire twisting machine, then through a back-twisting stress eliminating device, obtaining a single-stranded CNT composite transmission conductor. The method of the invention has the advantages: 1) the coefficient of linear expansion of the conductor is small, and the thermal deformation resistance performance is strong, the method can reduce the influence of the temperature on sag change, improve the sag characteristics, improve the security of overhead lines, and reduce the construction cost of the lines; 2) the method is helpful to improve the conductivity of the conductor along the line, and further reduce the transmission losses; and 3) the process is relatively simple, and the loosening and skid phenomenon and the like of composite cores and aluminium strands due to various reasons do not exist.

The invention relates to seawater corrosion resistant structural steel with the uniform metallographic structure and a production method thereof. The seawater corrosion resistant structural steel comprises the following compositions according to percentages by weight: 0.05-0.45% of C, 0.05-0.45% of Si, 1.50-2.50% of Mn, less than or equal to 0.025% of P, less than or equal to 0.006% of S, 0.001-0.0048% of Ti and the rest of Fe and inevitable impurities. The production method comprises the following steps of: smelting, and carrying out vacuum treatment and continuous casting to form a blank; conventionally heating and soaking the casting blank; carrying out subsection rolling, i.e. casting-state structure rolling, rolling of refining grains and homogenization rolling of grain sizes; naturally cooling till reaching room temperature, and setting aside for application. According to the observation of the structural steel by using a 200-times metallographic microscope, in a finished product steel plate, the grains with the size of 10-25mum accounts for 80%-90%, the grains with the size of greater than 25mum is less than or equal to 5%, and the size of the rest of grains is less than 10mum; the seawater corrosion resistant of the steel plate is increased by at least 45%; and the steel plate has good strength and toughness and excellent cold and hot deformation and welding performance.

A generally mushroom-shaped vibration isolator having a broad cap and a smaller diameter stem that is used for safety enhancement between a heavy furnace, air conditioning unit, storage hot water heater tank, or other fluid-producing unit, and a fluid-collecting pan positioned under it. Vibration isolator stems are placed within indentations in raised areas of the pan and comprise highly impact-resistant materials, temperature-resistant materials, provide enhanced air movement and heat deflection around a furnace/unit/tank, reduce after-installation furnace/unit/tank movement, and meet furnace non-combustible clearance requirements. The cap has a broad underside surface, top surface radially-extending ribs and cutouts, and may have a slightly convex top, while the stem has at least one outwardly-depending wedge-shaped projection that is sufficiently flared-out to flip over as it is inserted into an indentation for a tight fit within several sizes of indentation, as well as removal resistance. A tapered connection also exists between cap and stem.

The present disclosure relates to a probe card for testing semiconductor chips on a semiconductor wafer comprising: a circuit board receiving electrical signals from outside; a plurality of unit probe modules contacting the semiconductor chips on the wafer to transfer the electrical signals; a space transformer having the plurality of probe modules seated on the upper portion thereof and electrically connected to the circuit board, wherein the respective probe modules are arranged at intervals from each other on the space transformer and the space transformer has vertical apertures penetrating through it up and down;and at least one vertical conductive medium electrically connecting the respective unit probe modules and the circuit board, wherein the vertical conductive medium is arranged in the vertical apertures provided in the space transformer and the respective unit probe modules are arranged at positions spaced from the vertical conductive medium.

The present invention relates to an alloy steel for low temperature vacuum carburizing, and more particularly, to an alloy steel for low temperature vacuum carburizing, wherein, where the thermal processing of carburizing and quenching is performed at 810° C. or so of an available minimum carburizing temperature of a conventional vacuum carburizing furnace, it is able to securing an adequate ferrite phase (α) to improve the thermal distortion according to the thermal processing of an annulus gear, and to satisfying shape restrictions such as a roundness or a cylindricity of the annulus gear to be manufactured. An alloy steel for a low temperature vacuum carburizing according to the present invention, the alloy steel is composed of a chief element of Fe, wherein the alloy steel is formed so that dissolved oxygen (DO) is 10 ppm or less in an alloy system which comprises 0.17˜0.24 weight percent of C, 0.8˜1.2 weight percent of Cr, 0.4˜0.8 weight percent of Mn, 0.80˜1.20 weight percent of Si, 0.020 weight percent or less of P, 0.020 weight percent or less of S, 0.015˜0.045 weight percent of V, and the remaining weight percent of Fe.

The invention relates to a sealing structure and a sealing method of a non-welded metal plate single cell, the sealing structure comprises a single cell formed by stacking an anode plate, a membrane electrode and a cathode plate together, an air main channel is communicated with a cathode flow field through an air side air inlet duct and a negative plate air side boss, and a hydrogen main channel is communicated with an anode flow field through a hydrogen side gas inlet duct by penetrating through a hydrogen side boss of an anode plate; the anode plate air side boss is communicated with the anode plate water side boss through a first channel, a first communication hole is formed in a membrane electrode frame between the anode plate water side boss and the cathode plate water side boss, and the cathode plate water side boss is communicated with the cathode plate hydrogen side boss through a second channel; and sealing rings are formed in the anode plate air side boss, the first channel, the anode plate water side boss, the cathode plate water side boss, the second channel and the cathode plate hydrogen side boss through integrated glue injection. The sealing structure and the sealing method are high in reliability, low in production cost and high in production efficiency.

The invention relates to a method for preparing an NdFeB/SmCo5 composite permanent magnet doped with PrCu alloy by adopting a thermal deformation method and belongs to the technical field of magnetic materials. The ratio of the weight of PrCu alloy powder for doping to the weight of total powder is 2-15 weight percent. The deformation quantity of the composite magnet is 60-90 percent. The SPS technology thermal deformation method is adopted for preparing the NdFeB/SmCo5 thermal deformation composite rare earth permanent magnet doped with the PrCu alloy; in the process of thermal deformation, as a boundary phase, a PrCu phase can isolate two hard magnetic phases, so that the mutual diffusion is reduced, an exchange coupling effect between the two phases is weakened, and the coercive force is improved; in the process of thermal deformation, after being liquefied, the PrCu phase is diffused at a crystal boundary and can also coordinate the thermal deformation of the two phases to promote the thermal deformation of the two phases; the obtained nanocrystalline NdFeB/SmCo5 composite magnet doped with the PrCu alloy has good magnetic property, thermal stability, corrosion resistance and mechanical property.

The invention discloses a synchronous double-spindle-box numerically controlled lathe. The synchronous double-spindle-box numerically controlled lathe comprises a lathe body and a main motor arranged on one side of the lathe body, wherein a left spindle box and a right spindle box are arranged at the two ends of the lathe body, a synchronous shaft is arranged between the left spindle box and the right spindle box, the lathe body is provided with a lathe saddle, the lathe saddle is provided with a ball screw a, a servo driving motor a is arranged on one side of the lathe saddle, a middle supporting plate is arranged on the lathe saddle, a servo driving motor b is arranged on one side of the middle supporting plate, a ball screw b is arranged in the middle supporting plate, and an electric tool tower is arranged on the middle supporting plate. When the lathe machines a long-axis-class workpiece, the two ends of the workpiece can be clamped and rotate synchronously, multiple times of machining can be carried out on the workpiece through one time of clamping, and production efficiency is improved. Thus, the dimensional accuracy of the workpiece is guaranteed, the automation degree is high, the productivity efficiency is improved by 6-8 times, and the labor cost is largely reduced.

The invention provides a carbon fiber reinforced polyethylene waterproof roll and a preparation method thereof. The preparation method comprises the steps of fully mixing 56-90 parts of linear low density polyethylene (LLDPE) resin, 9-40 parts of chopped carbon fiber, 0.1-0.2 part of an antioxidant and 0.1-0.2 part of white oil, and then granulating; and mixing 95-100 parts of a granulated product, 3-5 parts of carbon black, 0.1-0.2 part of an antioxidant and 0.1-0.2 part of white oil, then plasticizing, extruding, shaping and cooling to obtain the final product. The carbon fiber reinforced polyethylene waterproof roll provided by the invention can overcome adverse effects caused by differences between interlayer structures, and the strength of the carbon fiber reinforced polyethylene waterproof roll is greatly improved.

The invention relates to the technical field of aluminum alloy processing, in particular to a preparation method of an aluminum alloy plate for aviation. The aluminum alloy comprises the following chemical components of, in percentage by mass, 0.05%-0.2% of zirconium, 0.05%-0.2% of scandium, 3.0%-6.0% of zinc, 3.0%-6.0% of magnesium, 3.0%-4.0% of copper, 0.2%-0.4% of silver, 0.05%-0.2% of lithium,1.0%-1.5% of manganese, 0.8%-1.5% of silicon, 0.20%-0.40% of titanium, 0.05%-0.1% of ruthenium, and the balance aluminum and inevitable impurities, and the content of the impurities is controlled tobe 0.15% or below; and an aluminum alloy melt is prepared according to pre-prepared materials, ultrasonic vibration is adopted in a refining process to refine grains, and then the aluminum alloy platefor the aviation is obtained through pouring, homogenization, extrusion, solid solution treatment, pre-stretching and three-stage aging treatment. According to the corrosion resistance aluminum alloyplate for the aviation and the preparation method of the corrosion resistance aluminum alloy plate, the Vickers hardness of the prepared aluminum alloy plate ranges from 175 Hv to 190 Hv, the yield strength ranges from 520 MPa to 562 MPa, the tensile strength ranges from 605 MPa to 656 MPa, the elongation ranges from 9.4% to 12%, the overall performance is excellent, and the aluminum alloy plateis particularly suitable for being used in the aerospace field.